I did something similar years ago.  I made a hinged panel surround that was made of Luan mahogany panels.  It was light enough to fold up and carry away.  It may not have been a fancy as this one, but sure hid all of my wires and pedals well.  I, also, did what Jerry did for my DX7, but it stayed home.
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pa4X 76 ,SX900, Hammond SK1, Ketron SD40,Ketron Event X Centerpoint Space Station, Bose compact